ANTLR (ANother Tool for Language Recognition) is a language tool that provides a framework for constructing recognizers, compilers, and translators from grammatical descriptions containing C++, Java, or Sather actions. It is similar to the popular compiler generator YACC, however ANTLR is much more powerful and easy to use. ANTLR-produced parsers are not only highly efficient, but are both human-readable and human-debuggable (especially with the interactive ParseView debugging tool). ANTLR can generate parsers, lexers, and tree-parsers in either C++, Java, or Sather. ANTLR is currently written in Java.

After the Deadline for WordPress is a plugin that
interfaces with After the Deadline, a Web service
that helps you improve your writing and spend less
time editing. This plugin adds a button for
checking spelling and writing style to the
WordPress visual editor mode. An API key is
required to access the After the Deadline service.

Algraeph is a tool for manual alignment of
linguistic graphs, such as phrase structure trees
or dependency structures, where each node
corresponds to a subsequence of the analyzed
input sentence. It allows you to express the
similarity between two graphs by aligning their
nodes and attaching relation labels to these
alignments. Graphs are read from one or more
graphbanks (or treebanks) in the GraphML or
Alpino formats. Alignment relations are
user-defined and are stored in a simple XML
format, which can be used for further processing.
The resulting parallel graph corpus is a useful
data set for many tasks in computational
linguistics and natural language processing.

An Gramadóir is a grammar checking engine that is
designed for the rapid development of grammar
checkers for minority languages and other
languages with limited computational resources.
Rule specifications are given according to a
simple syntax combining XML and regular
expressions. Part-of-speech tagging can be learned
from text corpora using statistical methods. It
is currently implemented for Irish (Gaeilge).

Apache Lucene is a high-performance,
full-featured text search engine library written
entirely in Java. It is suitable for nearly any
application that requires full-text search,
especially cross-platform.

Solr is an enterprise search platform from the Apache Lucene project. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, and rich document (e.g. Word and PDF) handling. Solr is highly scalable, providing distributed search and index replication, and it powers the search and navigation features of many of the world's largest internet sites.
Solr is written in Java and runs as a standalone full-text search server within a servlet container such as Tomcat. Solr uses the Lucene Java search library at its core for full-text indexing and search, and has REST-like HTTP/XML and JSON APIs that make it easy to use from virtually any programming language. Solr's powerful external configuration allows it to be tailored to almost any type of application without Java coding, and it has an extensive plugin architecture when more advanced customization is required.

Apertium is a machine translation platform,
initially aimed at related-language pairs, but
recently expanded to deal with more divergent
language pairs (such as English-Catalan). The
platform provides a language-independent machine
translation engine, tools to manage the linguistic
data necessary to build a machine translation
system for a given language pair, and linguistic
data for a growing number of language pairs.

Arabic Wordlist is a project to deliver an English
to Arabic translated word list to be used in
translations and/or dictionaries. The word list
contains in excess of 83,500 words (and growing),
and spans a variety of categories (i.e. it is
general in nature). This word list is encoded in
UTF-8, and is expected to be used in many online
free dictionaries.